All gases are not life saving some is dangerous. Gas Detector is the instrumentation and control product that is applied by the chemical industries to check the presence of any hazardous gas .In sewage treatment plants, in utility manholes the Toxic Gas Detectors are employed. In the hazardous waste sites, refineries and also in paper mills Multi Gas Detectors are applied. Gas Detectors are having easy-to-use techneque, simultaneous detection capacity, alarm system and are reliable in all the conditions. Different type of industries are now in the market to supply to the users with different type of gas detectors which include Natural Gas Detector, Radon Gas Detector, Propane Gas Detector and many more to add. The customer is having multiple choices to select from the products provided by the suppliers. Considering the choice and demand of the consumers the Producers are making these industrial products so as to satisfy the customers.